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Hemithecella
Taxonomy
Hemithecella was named by Butts (1941) [Ulrich & Bridge in Butts 1941; Sepkoski's age data: Cm Trep-l O Trem-l Sepkoski's reference number: 274]. It is the type genus of Hemithecellidae.
It was assigned to Hemithecellidae by Stinchcomb and Darrough (1995); to Paleoloricata by Sepkoski (2002); and to Mattheviidae by Runnegar et al. (1979) and Pojeta et al. (2010).
It was assigned to Hemithecellidae by Stinchcomb and Darrough (1995); to Paleoloricata by Sepkoski (2002); and to Mattheviidae by Runnegar et al. (1979) and Pojeta et al. (2010).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1941 | Hemithecella Butts |
| 1979 | Hemithecella Runnegar et al. p. 1389 |
| 1995 | Elongata Stinchcomb and Darrough |
| 1995 | Hemithecella Stinchcomb and Darrough p. 58 |
| 1995 | Elongata Stinchcomb and Darrough p. 62 |
| 2002 | Elongata Sepkoski |
| 2002 | Hemithecella Sepkoski |
| 2010 | Hemithecella Pojeta et al. p. 8 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Hemithecella Butts 1941
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†Hemithecella abrupta Stinchcomb and Darrough 1995
†Hemithecella eminensis Stinchcomb and Darrough 1995
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Invalid names: Elongata perplexa Stinchcomb and Darrough 1995 [synonym], Hemithecella elongata Stinchcomb and Darrough 1995 [synonym]
†Hemithecella expansa Butts 1941
†Hemithecella quinquelites Stinchcomb and Darrough 1995
Invalid names: Elongata Stinchcomb and Darrough 1995 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. Runnegar et al. 1979 | Relatively large chiton with body valves like those of Chelodes except that each may have a sizeable hole (muscle insertion?) beneath the posterior edge of the plate (Pl. 1, fig. 32); head and tail valves unknown. |